当前位置: X-MOL 学术Adv. Funct. Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Gold Nanoparticles Sliding on Recyclable Nanohoodoos—Engineered for Surface‐Enhanced Raman Spectroscopy
Advanced Functional Materials ( IF 19.0 ) Pub Date : 2017-11-23 , DOI: 10.1002/adfm.201704818
Kaiyu Wu 1, 2 , Tao Li 3 , Michael Stenbaek Schmidt 1, 2 , Tomas Rindzevicius 1, 2 , Anja Boisen 1, 2 , Sokol Ndoni 1, 4
Affiliation  

Robust, macroscopically uniform, and highly sensitive substrates for surface‐enhanced Raman spectroscopy (SERS) are fabricated using wafer‐scale block copolymer lithography. The substrate consists of gold nanoparticles that can slide and aggregate on dense and recyclable alumina/silicon nanohoodoos. Hot‐spot engineering is conducted to maximize the SERS performance of the substrate. The substrate demonstrates remarkably large surface‐averaged SERS enhancements, greater than 107 (>108 in hot spots), with unrivalled macroscopic signal uniformity as characterized by a coefficient of variation of only 6% across 4 cm. After SERS analyses, the nanohoodoos can be recycled by complete removal of gold via a one‐step, simple, and robust wet etching process without compromising performance. After eight times of recycling, the substrate still exhibits identical SERS performance in comparison to a new substrate. The macroscopic uniformity combined with recyclability at conserved high performance is expected to contribute significantly on the overall competitivity of the substrates. These findings show that the gold nanoparticles sliding on recyclable nanohoodoo substrate is a very strong candidate for obtaining cost‐effective, high‐quality, and reliable SERS spectra, facilitating a wide and simple use of SERS for both laboratorial and commercial applications.

中文翻译:

在可循环使用的纳米石上滑动的金纳米粒子,专为表面增强拉曼光谱而设计

使用晶片级嵌段共聚物光刻技术制造了用于表面增强拉曼光谱(SERS)的坚固,宏观均匀且高度敏感的基板。基底由可以在致密且可回收的氧化铝/硅纳米石上滑动和聚集的金纳米颗粒组成。进行热点工程设计可最大程度地提高基材的SERS性能。基材表现出极大的表面平均SERS增强,大于10 7(> 10 8在热点中),具有无与伦比的宏观信号均匀性,其特征是在4厘米范围内的变异系数仅为6%。在进行SERS分析后,可以通过一步,简单且稳定的湿法蚀刻工艺完全去除金,从而在不影响性能的情况下回收纳米石。八次循环使用后,与新基材相比,基材仍显示出相同的SERS性能。宏观上的均匀性与在保持高性能的条件下的可回收性相结合,有望对基材的整体竞争力产生重大影响。这些发现表明,在可循环使用的纳米石林基底上滑动的金纳米颗粒是获得具有成本效益,高质量和可靠的SERS光谱的非常有力的候选者,
更新日期:2017-11-23
down
wechat
bug